20127897 has 24 divisors (see below), whose sum is σ = 31599360. Its totient is φ = 12299040.

The previous prime is 20127893. The next prime is 20127901. The reversal of 20127897 is 79872102.

It is an interprime number because it is at equal distance from previous prime (20127893) and next prime (20127901).

It is not a de Polignac number, because 20127897 - 2² = 20127893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20127893) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3403 + ... + 7199.

It is an arithmetic number, because the mean of its divisors is an integer number (1316640).

Almost surely, 2^20127897 is an apocalyptic number.

It is an amenable number.

20127897 is a deficient number, since it is larger than the sum of its proper divisors (11471463).

20127897 is a wasteful number, since it uses less digits than its factorization.

20127897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853 (or 3850 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 20127897 is about 4486.4124866089. The cubic root of 20127897 is about 272.0191424316.

Adding to 20127897 its reverse (79872102), we get a palindrome (99999999).

The spelling of 20127897 in words is "twenty million, one hundred twenty-seven thousand, eight hundred ninety-seven".